Issue #3468029 by daneduijnkerke, LOBsTerr: Creating membership (accepting...

Issue #3468029 by daneduijnkerke, LOBsTerr: Creating membership (accepting invite) does not contain selected role

src/GroupInvitationManager.php

@@ -101,12 +101,12 @@ class GroupInvitationManager {
 
     $group_membership = GroupContent::create([
       'type' => $content_type_config_id,
-      'entity_id' => $group_invitation_content->entity_id->target_id,
+      'entity_id' => $group_invitation_content->getEntityId(),
       'plugin_id' => $plugin_id,
       'group_type' => $group_type_id,
       'gid' => $group->id(),
       'uid' => $group_invitation_content->getOwnerId(),
-      'group_roles' => $group_invitation_content->group_roles->value,
+      'group_roles' => $group_invitation_content->get('group_roles')->getValue(),
     ]);
 
     return $group_membership;